Linux · Kernel
CVE-2019-13272
Linux Kernel Improper Privilege Management Vulnerability
Qué es
In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to create a ptrace relationship, which allows local users to obtain root access by leveraging certain scenarios with a parent-child process relationship, where a parent drops privileges and calls execve (potentially allowing control by an attacker). One contributing factor is an object lifetime issue (which can also cause a panic). Another contributing factor is incorrect marking of a ptrace relationship as privileged, which is exploitable through (for example) Polkit's pkexec helper with PTRACE_TRACEME. NOTE: SELinux deny_ptrace might be a usable workaround in some environments.
CISA: Kernel/ptrace.c in Linux kernel mishandles contains an improper privilege management vulnerability that allows local users to obtain root access.
Qué hacer
Apply updates per vendor instructions.
Plazo para las agencias federales de EE. UU.: 10 de junio de 2022
- Añadida a la lista de CISA
- 10 de diciembre de 2021
- Publicada
- 17 de julio de 2019
- Gravedad
- Alto 7,8 CVSS 3.1
- Probabilidad de ataques en los próximos 30 días (EPSS)
- 52% entre el 1,0% superior de todas las vulnerabilidades conocidas
- Debilidad
- CWE-269
- Más detalles
- NVD · CVE.org · CISA
Todas las referencias (20)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGRK5LYWBJ4E…
- https://www.debian.org/security/2019/dsa-4484
- https://access.redhat.com/errata/RHSA-2019:2405
- https://access.redhat.com/errata/RHSA-2019:2411
- https://usn.ubuntu.com/4093-1/
- https://usn.ubuntu.com/4094-1/
- https://usn.ubuntu.com/4095-1/
- http://packetstormsecurity.com/files/153663/Linux-PTRACE_TRACEME-Broken-Permission-Object-Lifetime-Handling.h…
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1903
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1.17
- https://github.com/torvalds/linux/commit/6994eefb0053799d2e07cd140df6c2ea106c41ee
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6994eefb0053799d2e07cd140df6c2ea10…
- https://bugzilla.suse.com/show_bug.cgi?id=1140671
- https://bugzilla.redhat.com/show_bug.cgi?id=1730895
- https://seclists.org/bugtraq/2019/Jul/30
- https://seclists.org/bugtraq/2019/Jul/33
- https://lists.debian.org/debian-lts-announce/2019/07/msg00022.html
- https://lists.debian.org/debian-lts-announce/2019/07/msg00023.html
- http://packetstormsecurity.com/files/153702/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
- https://security.netapp.com/advisory/ntap-20190806-0001/
Más fallos explotados de Linux
| Añadido | Vulnerabilidad | Producto | Gravedad | Prob. de ataque |
|---|---|---|---|---|
| 18 sept 2026 | Improper Check for Unusual or Exceptional Conditions | Kernel | Crítica 9,8 | 3,3% |
| 18 sept 2026 | Race Condition | Kernel | Alto 7,8 | 1,6% |
| 18 sept 2026 | Out-of-Bounds Write | Kernel | Alto 8,8 | 0,9% |
| 27 ago 2026 | Unspecified | Kernel | Alto 7,8 | 0,7% |
| 26 ago 2026 | Out-of-Bounds Write | Kernel | Alto 7,8 | 8,9% |
| 2 jun 2026 | Improper Authentication | Kernel | Alto 7,8 | 5,5% |
| 1 may 2026 | Incorrect Resource Transfer Between Spheres | Kernel | Alto 7,8 | 98% |
| 26 ene 2026 | Integer Overflow | Kernel | Alto 7,8 | 15% |
Fuentes: Known Exploited Vulnerabilities (CISA, dominio público), CVE records (cve.org) y EPSS (FIRST). La probabilidad de ataque es la estimación EPSS de que alguien intente explotar el fallo en los próximos 30 días.